Synthesis of angular triquinanes from (+)-β-cedrol
摘要:
Angular triquinanes such as (+)-silphinan-3,5-dione, silphin-3-en-3,5-dione or 2-bromosilphin-3-en-3,5-dione have been obtained from (+)-beta-cedrene in seven steps and an overall yield of 8%. (C) 1998 Elsevier Science Ltd. All rights reserved.
Use of a highly effective intramolecular Pauson–Khand cyclisation for the formal total synthesis of (±)-α- and β-cedrene by preparation of cedrone
作者:James J. Crawford、William J. Kerr、Mark McLaughlin、Angus J. Morrison、Peter L. Pauson、Graeme J. Thurston
DOI:10.1016/j.tet.2006.05.044
日期:2006.12
The cedrene carbon skeleton was directly and efficiently assembled from a simple monocyclic precursor by the strategic use of a high yielding intramolecular Pauson–Khand cyclisation reaction. A small number of further synthetic manipulations provided a concise formaltotalsynthesis of α- and β-cedrene. The cyclisation precursor was readily prepared, with a stereoselective ketone alkenylation selectively
Total synthesis of α-cedrene: A new strategy utilizing N-Aziridinylimine radical chemistry
作者:Hee-Yoon Lee、Sejin Lee、Deogil Kim、Byung Kyu Kim、Jong Soo Bahn、Sunggak Kim
DOI:10.1016/s0040-4039(98)01680-3
日期:1998.10
Tandem free radical cycloaddition reaction of the N-Aziridinylimine intermediate produced tricyclo[5.3.1.01,5]undecaneskeleton stereoselectively. A total synthesis of α-cedrene was completed in three step sequence from the cyclization product.
Formal Total Synthesis of (±)-α- and β-Cedrene by Preparation of Cedrone. Construction of the Tricyclic Carbon Skeleton by the Use of a Highly Efficient Intramolecular Khand Annulation
作者:William J. Kerr、Mark McLaughlin、Angus J. Morrison、Peter L. Pauson
DOI:10.1021/ol016054a
日期:2001.9.1
rapidly assembled from a simple monocyclic precursor by the strategic use of a high yielding intramolecular Khand cyclization reaction. Further synthetic manipulations provided a concise formal totalsynthesis of alpha- and beta-cedrene. Reaction: see text.
Anionic Cyclization of N-(trans-2,3-Diphenylaziridin-1-yl)imines: Its Application to Sesquiterpene Synthesis via Consecutive Carbon-Carbon Bond-Formation Approach
作者:Sunggak Kim、Jung-Il Hwang
DOI:10.1055/s-0029-1219933
日期:2010.6
The anionic consecutive carbon-carbon (CC-C) bond formation can be achieved by the anioniccyclizations of N-(trans-2,3-diphenylaziridin-1-yl)imines with alkyllithiums. The synthetic efficiency of CC-C bond-formation approach has been demonstrated in the synthesis of dl-pentalenene and dl-cedrone.
sesquiterpenes, three monoterpenes and one diterpene natural product have been isolated from the seeds of Artemisiaannua. The possible biogenesis of some of these natural products are discussed by reference to recently reported experimental results for the autoxidation of dihydroartemisinic acid and other terpenoidsfromArtemisiaannua.